OTP Article

[Marc Ernst Eddy van Woerkom]

>   the only printed material about OTP that I know of are the books you
>   get from Ericsson when you buy a supported version of Erlang. You can
>   read them online, they're quite good.

BTW I can't access the OTP Article link on

    http://www.erlang.org/doc.html

and the other Ericsson articles neither.

Regards,
Marc